1321 Onyx Circle Longmont, CO ^$ 1,650,000

1321 Onyx Circle

^$ 1,650,000

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Open House 4/18 2pm - 4pm

1321 Onyx Circle

Longmont, CO, 80504

^$ 1,650,000

Bedrooms6 Baths6.0 Sq 5,147

Monthly Estimate*

^$ 10,159

Listed by Compass - Boulder

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Single Family Home for sale in Longmont, CO

for $1,650,000 with 6 bedrooms and 6 full baths. This 5,147 square foot home was built in 2004 on a lot size of 0.29.

Welcome to elevated living at 1321 Onyx Cir, nestled in the highly sought-after Rainbow Ridge Estates. This stunning 6-bedroom, 6-bathroom home, complete with a side-load 3-car garage, boasts undeniable curb appeal. Step inside, and you'll be greeted by a grand foyer with a dramatic staircase that sets the tone for this exquisite residence. From the Foyer, a thoughtfully designed home office or 6th bedroom with an attached 3/4 bathroom provides versatility. Formal dining room ideal space for hosting memorable gatherings. The chef's kitchen is a true centerpiece, showcasing a spacious central island, upgraded appliances, and a wall of windows that frame picturesque views of the serene backyard and sparkling pool. Flowing seamlessly from the kitchen, a welcoming family room with gas fireplace and soaring ceilings-perfect for both everyday living & special gatherings. Upstairs, a rare find: four spacious bedrooms, each with its own en-suite bathroom, all thoughtfully upgraded. The luxurious primary suite is a private retreat, featuring a beautifully appointed bathroom, and a peaceful getaway space to unwind in style. A sprawling lower level recreation room with a pool table, a functional exercise or playroom, and an inviting theater room equipped with a projector, wet bar, and wine cellar create endless opportunities for entertainment. A comfortable 5th bedroom with an adjoining upgraded bathroom ensures your guests will feel right at home. This home is designed for living, entertaining, and making cherished memories. From its elegant design to its abundance of amenities, 1321 Onyx Cir is your opportunity to embrace the best of Rainbow Ridge Estates living. Let's Get You Home!

Open House

4/18/2026 2:00 PM - 4:00 PM

1321 Onyx Circle Longmont, CO

* Some states or local ordinances may prohibit Open Houses at this time, please confirm with your Weichert agent or local rep to confirm

Single Family Active

Price

^$ 1,650,000

Bedrooms

Full Bath

Property Type

Single Family

Taxes

^$ 10,244

Style

Contemporary

Lot Size

0.29

Year Built

2004

Town/City

Longmont

County/Region

Boulder

MLS | Web ID

IR1055876

Features

Interior

Interior Amenities Eat-in Kitchen Five Piece Bath Kitchen Island Open Floorplan Pantry Primary Suite Vaulted Ceiling(s) Walk-In Closet(s) Wet Bar

Basement Full Sump Pump

Flooring Tile Wood

Fireplace Features Basement Gas Living Room Other Primary Bedroom

Basement (Y/N) Y

Window Features Double Pane Windows Window Coverings

Above Grade Finished Area 3525

Half Baths 0

3/4 Baths 4

Laundry Features In Unit

Total Bedrooms 6

Below Grade Finished Area 1622

Main Level Bedrooms 1

Main Level Bathrooms 1

Total Baths 6

General

Sewer Public Sewer

Heating Forced Air

Cooling Ceiling Fan(s) Central Air

Utilities Cable Available Electricity Available Internet Access (Wired) Natural Gas Available

Possession Closing/DOD

Roof Composition

Appliances Dishwasher Disposal Double Oven Dryer Oven Refrigerator Washer

Zoning SFH

HOA Fee 500

Garage Spaces 3

Association Fee Includes Reserves

Patio/Porch Features Patio

Architectural Style Contemporary

Pool Features Private

Security Features Smoke Detector(s)

Construction Materials Stone Stucco Frame

Exclusions Seller's personal property

Year Built 2004

Levels Two

Property Subtype Single Family Residence

Tax Year 2025

Ownership Individual

Assoc Fee Paid Per Annually

County Boulder

Property Type Residential

Association Amenities Park

HOA Y

Attached Garage Y

Subdivision Name Rainbow Ridge Estates

Possible Use Residential

Full Baths 2

Status Active

Directions From the Diagonal; turn South On Hover St left on Plateau Rd left on Moonstone Ct Left on Onyx Cir.

High School Niwot

City Longmont

Association Name Rainbow Ridge Estates

High School District St. Vrain Valley RE-1J

Lot Size Square Feet 12844

Listing Terms Cash Conventional

Elementary School Burlington

Tax Annual Amount 10244

Middle/Junior High School Sunset

Concessions No

Virtual Tour https://www.zillow.com/view-imx/12b7c3fd-ef97-42cd-aee6-8e03c2c1b597?initialViewType=pano

Structure Type House

Standard Status Active

Elementary School District St. Vrain Valley RE-1J

Exterior

Exterior Amenities Spa/Hot Tub

Vegetation Wooded

Fencing Fenced

Lot Features Level Sprinklers In Front

Water Source Public

Total Parking 3

Building Area Total 5147

Lot Size Acres 0.29

Road Surface Type Paved

Road Frontage Type Public

Other Equipment Home Theater Satellite Dish

Road Responsibility Public Maintained Road

Internal Only

Street Number 1 1321

* Excluded Features

List By

Compass - Boulder

Broker

(303) 931-5483

Phone

Affordability Calculator

$11,013

Per Month

Monthly Principal & Interest: $10,159
Monthly Property Taxes: $854
Monthly Home Insurance: --

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Interest Rate

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Yearly Home Insurance

Default based on a 30-year fixed rate of 6.25% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.

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Nearby

Trends
Schools

Single family listings in Longmont, CO

Average List Price ^$1,190,029

Percent of Sale Price 28%

About Longmont, CO

95,205 Population

31% Since 2002

^$64,602 Median Income

39.12 Median Age

30% Households with Children

View more area information

Trends Information provided by ATTOM Data Solutions.

3043697 Elementary School

910867 Middle School

Niwot High School High School

See complete school information

Pricing History

Date	Price	Price Change	Description
4/8/2026	$1,650,000		Listed Price

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1321 Onyx Circle, Longmont, CO, 80504 is a Single Family Home for sale at $1,650,000 with 5,147 sqft and a lot size of 0.29. 1321 Onyx Circle has 6 bedrooms, 6.0 baths, and was built in 2004. The property's zip code is 80504 which is in Longmont, CO

*Information deemed reliable but not guaranteed.

Financial calculator disclaimer: Default based on a 30-year fixed rate of 6.25% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.

The data relating to real estate on this web site comes in part from the Internet Data eXchange (IDX) Program of the REcolorado. Real estate listings held by firms other than Weichert Realtors are marked with the IDX logo and detailed information about them includes the Listing Broker’s Firm Name.

The information being provided is for consumers personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

Data is updated as of 4/16/2026.

This publication is designed to provide information with regard to the subject matter covered. It is displayed with the understanding that the publisher and authors are not engaged in rendering real estate, legal, accounting, tax, or other professional services and that the publisher and authors are not offering such advice in this publication. If real estate, legal, or other expert assistance is required, the services of a competent, professional person should be sought.

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PUBLISHER’S NOTICE: All real estate advertised herein is subject to the Federal Fair Housing Act and the Colorado Fair Housing Act, which Acts make it illegal to make or publish any advertisement that indicates any preference, limitation, or discrimination based on race, color, religion, sex, handicap, familial status, or national origin.

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1321 Onyx Circle

Single Family Home for sale in Longmont, CO

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